How best to make glue/resin
I approached this by creating a custom texture. First I Marked three seams in the base mesh CTRL + E > Mark Seam. 



Then unwrapped it. By selecting all of the vertices and pressing U > Unwrap. I scaled the UV Map larger because I was only interested in the area I applied the custom resin texture to.



Then exported the UV layout and in an image editor created a custom texture. Of course turned off the UV Layout before saving the finished texture.